How many 2 digit numbers have the digit 7 at least once?

How many 2 digit numbers have the digit 7 at least once?

Answer Expert Verified There are 18 two digit numbers containing 7. Solution: 7 is a unit digit and if we add 10 with it, it results a two digit number 17, just by changing the digit in the tenth place, contains 7. In this process, we find numbers 17, 27, 37, 47, 57, 67, 77, 87 and 97.

How many 2-digit numbers contain the digit 2?

Solution. The 2-digit numbers that contain 2 can be produced by listing them systematically. They are 12, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 42, 52, 62, 72, 82, 92. There are 18 of them.

When a two digit number is reversed then the new number becomes 5/6 of the original number then the number is?

Hence, the number is 54.

What number is 7 times the sum of its two digits?

Answer : Given : a number consisting of two digits is 7 times the sum of its digits. when 27 is subtracted from the number the digits are reversed. To find : the number. As the number is a two digit , then let x be tens’s place and y be one’s place. a number consisting of two digits is 7 times the sum of its digits.

What is a two digit number with 27 as its value?

Answer : Given : a number consisting of two digits is 7 times the sum of its digits. when 27 is subtracted from the number the digits are reversed. To find : the number. As the number is a two digit, then let x be tens’s place and y be one’s place. Therefore the two digit number would form as 10 x +y

What is the tens digit of a two-digit number?

The tens digit of a two-digit number is two more than its unit digit. The two-digit number is 7 times the sum of the digits. Find the units digits? – Quora The tens digit of a two-digit number is two more than its unit digit. The two-digit number is 7 times the sum of the digits.

How do you find the unit digit of a two-digit number?

Let the unit digit be x. The number is 10 (x+2) +x. The sum of the digits =x+2+x = 2x+2. Or 4x = 22-14 =8. Or x =2. Therefore the unit digit is 2. The units digit in a two-digit number is 4 more than thrice the tens digit.